st: Too small standard errors with QREG?

Hi,
I've estimated a quantile regression (QREG) which requires an iterative
process to minimize the sum of the absolute residuals. Something strange
happens with my results: the standard errors are extremly small (note that
the CI are points rather than ranges...). Does anyone have any thoughts
about why this might be happening? My model does have in it many variables
(lots of interaction terms) but I don't hink that should be a problem given
the large sample size.